550218 has 8 divisors (see below), whose sum is σ = 1100448. Its totient is φ = 183404.

The previous prime is 550213. The next prime is 550241. The reversal of 550218 is 812055.

It is a sphenic number, since it is the product of 3 distinct primes.

550218 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 550194 and 550203.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 550218.

It is not an unprimeable number, because it can be changed into a prime (550211) by changing a digit.

550218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45846 + ... + 45857.

It is an arithmetic number, because the mean of its divisors is an integer number (137556).

2⁵⁵⁰²¹⁸ is an apocalyptic number.

550218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

550218 is a wasteful number, since it uses less digits than its factorization.

550218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91708.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 550218 is about 741.7668097185. The cubic root of 550218 is about 81.9429506021.

The spelling of 550218 in words is "five hundred fifty thousand, two hundred eighteen".